Ravenna, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.7 °C (low) to 15.1 °C (high). Annual precipitation averages 1061 Millimeters. Ravenna is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.4 °C | 0.9 °C | 75.18 mm |
| February | -6.8 °C | 2.4 °C | 58.42 mm |
| March | -2.6 °C | 7.6 °C | 80.77 mm |
| April | 3.5 °C | 14.9 °C | 96.01 mm |
| May | 9.2 °C | 21.2 °C | 104.39 mm |
| June | 14.4 °C | 25.7 °C | 109.73 mm |
| July | 16.5 °C | 27.8 °C | 110.24 mm |
| August | 15.5 °C | 27 °C | 91.69 mm |
| September | 11.6 °C | 23.3 °C | 97.54 mm |
| October | 5.7 °C | 16.6 °C | 85.85 mm |
| November | 0.5 °C | 9.6 °C | 75.69 mm |
| December | -4 °C | 3.6 °C | 75.44 mm |
| Annual | 4.7 °C | 15.1 °C | 1060.95 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |